Nested Grids
<UserControl x:Class='SilverlightApplication3.MainPage' xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' xmlns:d='http://schemas.microsoft.com/expression/blend/2008' xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006' mc:Ignorable='d' xmlns:basics='clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls' d:DesignWidth='640' d:DesignHeight='480'> <Grid Background="White"> <Grid.ColumnDefinitions> <ColumnDefinition></ColumnDefinition> <ColumnDefinition Width="Auto"></ColumnDefinition> <ColumnDefinition></ColumnDefinition> </Grid.ColumnDefinitions> <Grid Grid.Column="0" VerticalAlignment="Stretch"> <Grid.RowDefinitions> <RowDefinition></RowDefinition> <RowDefinition></RowDefinition> </Grid.RowDefinitions> <Button Margin="3" Grid.Row="0" Content="Top Left"></Button> <Button Margin="3" Grid.Row="1" Content="Bottom Left"></Button> </Grid> <basics:GridSplitter Grid.Column="1" Width="3" HorizontalAlignment="Center" VerticalAlignment="Stretch" Background="Gray"> </basics:GridSplitter> <Grid Grid.Column="2"> <Grid.RowDefinitions> <RowDefinition></RowDefinition> <RowDefinition Height="Auto"></RowDefinition> <RowDefinition></RowDefinition> </Grid.RowDefinitions> <Button Grid.Row="0" Margin="3" Content="Top Right"></Button> <Button Grid.Row="2" Margin="3" Content="Bottom Right"></Button> <basics:GridSplitter Grid.Row="1" Height="3" VerticalAlignment="Center" HorizontalAlignment="Stretch" Background="Gray" ShowsPreview="False"></basics:GridSplitter> </Grid> </Grid> </UserControl>